"The Bull GunBarrel configuration. Only one barrel was used on the Gull Gun During entire production span.Barrel #6. Extra Heavy 28", Chrome-Molybdenum Steel.This barrel had an extra large diameter, 1.25" at the receiver ring tapering to .845" at the, muzzle...."

"The Varmint RifleBarrel Configurations. During the Varmint Rifles' relatively short production, two barrel configurations were used..." Both were listed as Medium Heavv 26"